diff --git a/Cargo.lock b/Cargo.lock
index ff8b136..357d0c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -155,6 +155,17 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "derivative"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "dispatch"
 version = "0.2.0"
@@ -178,6 +189,25 @@ dependencies = [
  "nohash-hasher",
 ]
 
+[[package]]
+name = "egui-inspect"
+version = "0.1.0"
+source = "git+https://github.com/crumblingstatue/egui-inspect.git#135c81eb0264ddbec69f98b0a9d5c7ec22867736"
+dependencies = [
+ "egui",
+ "egui-inspect-derive",
+]
+
+[[package]]
+name = "egui-inspect-derive"
+version = "0.1.0"
+source = "git+https://github.com/crumblingstatue/egui-inspect.git#135c81eb0264ddbec69f98b0a9d5c7ec22867736"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "egui-sfml"
 version = "0.4.0"
@@ -218,7 +248,7 @@ checksum = "50d6a0976c999d473fe89ad888d5a284e55366d9dc9038b1ba2aa15128c4afa0"
 dependencies = [
  "errno-dragonfly",
  "libc",
- "windows-sys",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -430,9 +460,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "hecs"
-version = "0.10.1"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6befb02da14cb43e4d0e2cd369d516ed3abc70ce380a5b141c8ab6ca120c0b70"
+checksum = "94cd00eb6bc3e98b1aea624d00da6fa27d984f4494cf7b4ae8fdcd9b2d5c16a0"
 dependencies = [
  "hashbrown 0.13.2",
  "spin",
@@ -465,13 +495,13 @@ dependencies = [
 
 [[package]]
 name = "io-lifetimes"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09270fd4fa1111bc614ed2246c7ef56239a3063d5be0d1ec3b589c505d400aeb"
+checksum = "9c66c74d2ae7e79a5a8f7ac924adbe38ee42a859c6539ad869eb51f0b52dc220"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -485,9 +515,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.140"
+version = "0.2.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
 
 [[package]]
 name = "link-cplusplus"
@@ -537,6 +567,9 @@ name = "mantle-diver"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "derivative",
+ "egui",
+ "egui-inspect",
  "egui-sfml",
  "fnv",
  "gamedebug_core",
@@ -653,7 +686,7 @@ dependencies = [
  "libc",
  "redox_syscall",
  "smallvec",
- "windows-sys",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -687,7 +720,7 @@ dependencies = [
  "libc",
  "log",
  "pin-project-lite",
- "windows-sys",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -698,9 +731,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.55"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d0dd4be24fcdcfeaa12a432d588dc59bbad6cad3510c67e74a2b6b2fc950564"
+checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
 dependencies = [
  "unicode-ident",
 ]
@@ -786,22 +819,22 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.37.6"
+version = "0.37.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d097081ed288dfe45699b72f5b5d648e5f15d64d900c7080273baa20c16a6849"
+checksum = "1aef160324be24d31a62147fae491c14d2204a3865c7ca8c3b0d7f7bcb3ea635"
 dependencies = [
  "bitflags",
  "errno",
  "io-lifetimes",
  "libc",
  "linux-raw-sys",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
 name = "s2dc"
 version = "0.1.0"
-source = "git+https://github.com/crumblingstatue/s2dc.git#68cc3009cf86a65d7b17f93f44fa8b2cf812c11c"
+source = "git+https://github.com/crumblingstatue/s2dc.git#468ab3ca6de2d05f1eb5cdd8d869055d9157fb76"
 dependencies = [
  "num-traits",
 ]
@@ -876,9 +909,9 @@ dependencies = [
 
 [[package]]
 name = "spin"
-version = "0.9.7"
+version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0959fd6f767df20b231736396e4f602171e00d95205676286e79d4a4eb67bef"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
 
 [[package]]
 name = "syn"
@@ -1084,7 +1117,7 @@ version = "0.44.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e745dab35a0c4c77aa3ce42d595e13d2003d6902d6b08c9ef5fc326d08da12b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.42.2",
 ]
 
 [[package]]
@@ -1093,7 +1126,16 @@ version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.42.2",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.0",
 ]
 
 [[package]]
@@ -1102,13 +1144,28 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.0",
+ "windows_aarch64_msvc 0.48.0",
+ "windows_i686_gnu 0.48.0",
+ "windows_i686_msvc 0.48.0",
+ "windows_x86_64_gnu 0.48.0",
+ "windows_x86_64_gnullvm 0.48.0",
+ "windows_x86_64_msvc 0.48.0",
 ]
 
 [[package]]
@@ -1117,42 +1174,84 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
 [[package]]
 name = "winnow"
 version = "0.4.1"
diff --git a/Cargo.toml b/Cargo.toml
index 427187f..354b5bc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,9 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.70"
+derivative = "2.2.0"
 egui-sfml = "0.4.0"
+egui = "0.21.0"
 fnv = "1.0.7"
 hecs = "0.10.1"
 num-traits = "0.2.15"
@@ -24,3 +26,6 @@ git = "https://github.com/crumblingstatue/sfml-xt.git"
 
 [dependencies.gamedebug_core]
 git = "https://github.com/crumblingstatue/gamedebug_core.git"
+
+[dependencies.egui-inspect]
+git = "https://github.com/crumblingstatue/egui-inspect.git"
diff --git a/src/app.rs b/src/app.rs
index b51fedb..5737bde 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -1,6 +1,7 @@
 use std::fmt::{self};
 
 use anyhow::Context;
+use egui_inspect::UiExt;
 use egui_sfml::{egui, SfEgui};
 use gamedebug_core::{imm, imm_dbg};
 use sfml::{
@@ -330,20 +331,15 @@ fn debug_panel_ui(
                 game.player.vspeed,
                 px_per_frame_to_km_h(game.player.vspeed)
             ));
-            ui.label("Gravity");
-            ui.add(egui::DragValue::new(&mut game.gravity));
         }
-        ui.label("Tile to place");
-        ui.add(egui::DragValue::new(&mut game.tile_to_place));
         ui.label("Music volume");
         let mut vol = res.surf_music.volume();
         ui.add(egui::DragValue::new(&mut vol));
         res.surf_music.set_volume(vol);
         ui.separator();
-        ui.label("Ambient light");
-        ui.add(egui::DragValue::new(&mut game.ambient_light).speed(0.01));
         ui.label("Scale");
         ui.add(egui::DragValue::new(scale));
+        ui.inspect_mut(game, &mut 0);
         egui::ScrollArea::vertical().show(ui, |ui| {
             gamedebug_core::for_each_imm(|info| match info {
                 gamedebug_core::Info::Msg(msg) => {
diff --git a/src/debug.rs b/src/debug.rs
index 19d6db4..9576ffa 100644
--- a/src/debug.rs
+++ b/src/debug.rs
@@ -2,7 +2,7 @@ use sfml::window::Key;
 
 use crate::input::Input;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct DebugState {
     pub panel: bool,
     pub freecam: bool,
diff --git a/src/game.rs b/src/game.rs
index f732b28..3e25dc4 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -1,5 +1,7 @@
 mod player;
 
+use derivative::Derivative;
+use egui_inspect::derive::Inspect;
 use sfml::{
     graphics::{
         glsl::{Vec2, Vec4},
@@ -20,20 +22,26 @@ use crate::{
 
 use self::player::Player;
 
+#[derive(Derivative, Inspect)]
+#[derivative(Debug)]
 pub struct GameState {
     pub camera_offset: WorldPos,
+    #[opaque]
     pub world: World,
     pub player: Player,
     pub gravity: f32,
     pub tile_to_place: TileId,
     pub current_biome: Biome,
     pub prev_biome: Biome,
+    #[derivative(Debug = "ignore")]
+    #[opaque]
     pub worldgen: Worldgen,
     pub ambient_light: f32,
+    #[opaque]
     pub clock: SfBox<Clock>,
 }
 
-#[derive(PartialEq, Eq, Clone, Copy)]
+#[derive(PartialEq, Eq, Clone, Copy, Debug, Inspect)]
 pub enum Biome {
     Surface,
     Underground,
diff --git a/src/game/player.rs b/src/game/player.rs
index ddf8ce4..f1c791b 100644
--- a/src/game/player.rs
+++ b/src/game/player.rs
@@ -1,3 +1,4 @@
+use egui_inspect::derive::Inspect;
 use s2dc::{vec2, MobileEntity};
 
 use crate::{
@@ -5,7 +6,9 @@ use crate::{
     world::{TilePos, TilePosScalar},
 };
 
+#[derive(Debug, Inspect)]
 pub struct Player {
+    #[opaque]
     pub col_en: MobileEntity,
     pub vspeed: f32,
     pub hspeed: f32,
diff --git a/src/graphics.rs b/src/graphics.rs
index 528cc83..5540901 100644
--- a/src/graphics.rs
+++ b/src/graphics.rs
@@ -23,7 +23,7 @@ impl ScreenRes {
 }
 
 // We assume this game won't be played above 32767*32767 resolution
-#[derive(Default, Clone, Copy)]
+#[derive(Default, Clone, Copy, Debug)]
 pub struct ScreenPos {
     pub x: ScreenPosScalar,
     pub y: ScreenPosScalar,
diff --git a/src/input.rs b/src/input.rs
index 27ca58d..c362a8b 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -3,7 +3,7 @@ use sfml::window::{mouse, Event, Key};
 
 use crate::graphics::ScreenPos;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct Input {
     down: FnvHashSet<Key>,
     pressed: FnvHashSet<Key>,
diff --git a/src/math.rs b/src/math.rs
index 7cf8cc0..3c90ae1 100644
--- a/src/math.rs
+++ b/src/math.rs
@@ -1,10 +1,11 @@
+use egui_inspect::derive::Inspect;
 use num_traits::Signed;
 
 use crate::world::{TilePos, TilePosScalar};
 
 pub type WorldPosScalar = u32;
 
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, Debug, Inspect)]
 pub struct WorldPos {
     pub x: WorldPosScalar,
     pub y: WorldPosScalar,
diff --git a/src/res.rs b/src/res.rs
index 5e71c52..050f0c9 100644
--- a/src/res.rs
+++ b/src/res.rs
@@ -4,6 +4,7 @@ use sfml::{
     SfBox,
 };
 
+#[derive(Debug)]
 pub struct Res {
     pub tile_atlas: SfBox<Texture>,
     pub surf_music: Music<'static>,
diff --git a/src/world.rs b/src/world.rs
index 17c0f2f..b089702 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -10,7 +10,7 @@ pub struct ChunkPos {
     pub y: ChunkPosScalar,
 }
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct World {
     /// The currently loaded chunks
     chunks: FnvHashMap<ChunkPos, Chunk>,
@@ -99,6 +99,7 @@ const CHUNK_N_TILES: usize = CHUNK_EXTENT as usize * CHUNK_EXTENT as usize;
 
 type ChunkTiles = [Tile; CHUNK_N_TILES];
 
+#[derive(Debug)]
 pub struct Chunk {
     tiles: ChunkTiles,
 }
@@ -135,7 +136,7 @@ impl Chunk {
 
 pub type TileId = u16;
 
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, Debug)]
 pub struct Tile {
     /// Background wall behind entities
     pub bg: TileId,